go.net/ipv6: implement getsockopt, setsockopt syscalls
This CL implements a part of syscall package that's not included
in Go 1.1 release for not to annoy people who need some package
in go.net sub repository with Go 1.1.
Update golang/go#6548
R=dave, dsymonds, adg
CC=golang-dev
https://golang.org/cl/19940044
diff --git a/ipv6/sys_bsd.go b/ipv6/sys_bsd.go
new file mode 100644
index 0000000..4a08217
--- /dev/null
+++ b/ipv6/sys_bsd.go
@@ -0,0 +1,48 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build freebsd netbsd openbsd
+
+package ipv6
+
+import (
+ "net"
+ "syscall"
+)
+
+// RFC 3493 options
+const (
+ // See /usr/include/netinet6/in6.h.
+ sysSockoptUnicastHopLimit = 0x4
+ sysSockoptMulticastHopLimit = 0xa
+ sysSockoptMulticastInterface = 0x9
+ sysSockoptMulticastLoopback = 0xb
+ sysSockoptJoinGroup = 0xc
+ sysSockoptLeaveGroup = 0xd
+)
+
+// RFC 3542 options
+const (
+ // See /usr/include/netinet6/in6.h.
+ sysSockoptReceiveTrafficClass = 0x39
+ sysSockoptTrafficClass = 0x3d
+ sysSockoptReceiveHopLimit = 0x25
+ sysSockoptHopLimit = 0x2f
+ sysSockoptReceivePacketInfo = 0x24
+ sysSockoptPacketInfo = 0x2e
+ sysSockoptReceivePathMTU = 0x2b
+ sysSockoptPathMTU = 0x2c
+ sysSockoptNextHop = 0x30
+ sysSockoptChecksum = 0x1a
+
+ // See /usr/include/netinet6/in6.h.
+ sysSockoptICMPFilter = 0x12
+)
+
+func setSockaddr(sa *syscall.RawSockaddrInet6, ip net.IP, ifindex int) {
+ sa.Len = syscall.SizeofSockaddrInet6
+ sa.Family = syscall.AF_INET6
+ copy(sa.Addr[:], ip)
+ sa.Scope_id = uint32(ifindex)
+}
